lattice-to-phone-lattice.cc
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// latbin/lattice-to-phone-lattice.cc
// Copyright 2009-2011 Microsoft Corporation
// See ../../COPYING for clarification regarding multiple authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
// WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
// MERCHANTABLITY OR NON-INFRINGEMENT.
// See the Apache 2 License for the specific language governing permissions and
// limitations under the License.
#include "base/kaldi-common.h"
#include "util/common-utils.h"
#include "fstext/fstext-lib.h"
#include "lat/kaldi-lattice.h"
#include "lat/lattice-functions.h"
#include "hmm/transition-model.h"
int main(int argc, char *argv[]) {
try {
using namespace kaldi;
typedef kaldi::int32 int32;
typedef kaldi::int64 int64;
using fst::SymbolTable;
using fst::VectorFst;
using fst::StdArc;
const char *usage =
"Convert the words or transition-ids into phones, which are worked out\n"
"from the transition-ids. If --replace-words=true (true by default),\n"
"replaces the words with phones, otherwise replaces the transition-ids.\n"
"If --replace-words=false, it will preserve the alignment of transition-ids/phones\n"
"to words, so that if you do \n"
"lattice-align-words | lattice-to-phone-lattice --replace-words=false,\n"
"you can get the phones corresponding to each word in the lattice.\n"
"\n"
"Usage: lattice-to-phone-lattice [options] model lattice-rspecifier lattice-wspecifier\n"
" e.g.: lattice-to-phone-lattice 1.mdl ark:1.lats ark:phones.lats\n"
"See also: lattice-align-words, lattice-align-phones\n";
ParseOptions po(usage);
bool replace_words = true;
po.Register("replace-words", &replace_words,
"If true, replace words with phones; otherwise replace "
"transition-ids with phones.");
po.Read(argc, argv);
if (po.NumArgs() != 3) {
po.PrintUsage();
exit(1);
}
std::string model_rxfilename = po.GetArg(1),
lats_rspecifier = po.GetArg(2),
lats_wspecifier = po.GetArg(3);
int32 n_done = 0;
TransitionModel trans_model;
ReadKaldiObject(model_rxfilename, &trans_model);
SequentialCompactLatticeReader clat_reader(lats_rspecifier);
CompactLatticeWriter clat_writer(lats_wspecifier); // write as compact.
for (; !clat_reader.Done(); clat_reader.Next()) {
if (replace_words) {
Lattice lat;
ConvertLattice(clat_reader.Value(), &lat);
ConvertLatticeToPhones(trans_model, &lat); // this function replaces words -> phones
CompactLattice clat;
ConvertLattice(lat, &clat);
clat_writer.Write(clat_reader.Key(), clat);
} else { // replace transition-ids with phones.
CompactLattice clat(clat_reader.Value());
ConvertCompactLatticeToPhones(trans_model, &clat);
// this function replaces transition-ids with phones. We do it in the
// CompactLattice form, in order to preserve the alignment of
// transition-id sequences/phones-sequences to words [e.g. if you just
// did lattice-align-words].
clat_writer.Write(clat_reader.Key(), clat);
}
n_done++;
}
KALDI_LOG << "Done converting " << n_done << " lattices.";
return (n_done != 0 ? 0 : 1);
} catch(const std::exception &e) {
std::cerr << e.what();
return -1;
}
}